90085391749 has 8 divisors (see below), whose sum is σ = 97034476032. Its totient is φ = 83389001520.

The previous prime is 90085391741. The next prime is 90085391777. The reversal of 90085391749 is 94719358009.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90085391749 - 2³ = 90085391741 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90085391749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90085391741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63172774 + ... + 63174199.

It is an arithmetic number, because the mean of its divisors is an integer number (12129309504).

Almost surely, 2^90085391749 is an apocalyptic number.

It is an amenable number.

90085391749 is a deficient number, since it is larger than the sum of its proper divisors (6949084283).

90085391749 is a wasteful number, since it uses less digits than its factorization.

90085391749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126347027.

The product of its (nonzero) digits is 2449440, while the sum is 55.

The spelling of 90085391749 in words is "ninety billion, eighty-five million, three hundred ninety-one thousand, seven hundred forty-nine".